package SimpleFactory.bll;

//只实现减法功能
public class SubOperation extends Operation{
//	private double numberA,numberB;
//	public void setValues(double numberA,double numberB) {
//		this.numberA = numberA;
//		this.numberB = numberB;
//	}
	public double getresult(){
		return numberA-numberB;
	}
}
